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However, you should have browsed all 355 pages, you would easily quickly understand what to skip and what to read
After major skin changes, it is necessary to clean the cache and delete save folder. If you have something (poi, etc) saved, back it up first (and it's been written about a lot of times).
This kind of behavior that you mentioned, the problem is usually location of installation (sd card), the system and permissions.

If you are not skilled enough, do not use skin (especially not so complex).
If you care so much about the sky (which is an absolutely irrelevant item, especially while driving) then you just needed to find out how to just add it and nothing else.

So, start reading. A lot.